wrong rowHeight ratio

[tasiot]

When using margin and rowHeight as "*1.4" or "/1.4", block don't respect this ratio.
Indeed, rowHeight is calculated by curColWidth but it includes a margin, so ratio is no correctly calculated.

Solution consists to substract margin in curColWidth, calculate curRowHeight and add margin in curRowHeight.

if (gridster.colWidth === 'auto') {
	gridster.curColWidth = (gridster.curWidth + (gridster.outerMargin ? -gridster.margins[0] : gridster.margins[0])) / gridster.columns;
} else {
	gridster.curColWidth = gridster.colWidth;
}
var colWidthNoMargin = gridster.curColWidth - gridster.margins[0];

gridster.curRowHeight = gridster.rowHeight;
if (typeof gridster.rowHeight === 'string') {
	if (gridster.rowHeight === 'match') {
		gridster.curRowHeight = (gridster.curColWidth);
	} else if (gridster.rowHeight.indexOf('*') !== -1) {
		gridster.curRowHeight = (colWidthNoMargin * gridster.rowHeight.replace('*', '').replace(' ', '') + gridster.margins[1]);
	} else if (gridster.rowHeight.indexOf('/') !== -1) {
		gridster.curRowHeight = (colWidthNoMargin / gridster.rowHeight.replace('/', '').replace(' ', '') + gridster.margins[1]);
	}
}